Two-year-old Zuma spent a good portion of his time taking an important call on his iPhone 4, while his five-year-old bro tried to distracted him with kisses.

But the day wasn't a total bore. Both boys fell under the spell of a performing street musician, who captured their interest so long they gave the man a sweet tip. There's no mistaking these kids' parents are in the music industry!

Will Kingston and Zuma grow up to be musicians like their famous 'rents?